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Table 7

Estimates of the stellar luminosity (L) and spectroscopic mass ( Ms) for our sample.

Star ST A k log L/ L⊙  Ms/ M⊙  Me/ M⊙  Mo/ M⊙ log t
VISTA 2MASS Visible VISTA 2MASS Adopted
003 B1 Ia+ – 0.24 – – 6.03 6.03 71 44 49 6.56
028 B0.7 Ia Nwk – 0.33 5.51 – 5.76 5.76 40 44 48 6.56
060 B1.5 II-Ib((n)) 0.42 0.37 4.75 4.82 4.85 4.82 8 23 23 6.84
069 B0.7 Ib-Iab 0.29 0.29 5.34 5.59 5.61 5.59 29 37 40 6.62
082 B0.5 Ib-Iab 0.15 0.18 5.09 5.26 5.32 5.26 17 30 31 6.71
087 O9.7 Ib-II 0.09 0.09 5.16 5.27 5.29 5.27 19 30 31 6.68
165 O9.7 Iab 0.20 – 5.33 5.46 – 5.46 22 39 42 6.59
178 O9.7 Iab 0.14 0.12 5.47 5.60 5.59 5.60 33 35 37 6.63
232 B3 Ia 0.30 0.32 4.93 4.90 4.93 4.90 11 21 21 6.88
261 B5 Ia – 0.16 5.02 – 5.14 5.14 21 20 20 6.91
269 B8 Ia – 0.07 4.62 – 4.71 4.71 8 19 19 6.93
270 B3 Ib 0.06 – 4.36 4.51 – 4.51 11 12 13 7.18
293 B2 III-II(n)e 0.30 – 4.32 4.84 – 4.84 18 15 15 7.08
302 B1.5 Ib 0.31 0.29 4.62 4.78 4.78 4.78 11 18 18 6.96
307 B1 II-Ib 0.11 0.15 4.96 5.09 5.11 5.09 13 26 27 6.79
315 B1 Ib 0.11 0.16 4.63 4.64 4.69 4.64 9 17 17 6.98
417 B2 Ib 0.35 0.49 4.51 4.73 – 4.51 4 23 24 6.83
431 B1.5 Ia Nstr – 0.23 5.60 – 5.79 5.79 43 36 40 6.64
458 B5 Ia+p – 0.38 5.59 – 5.64 5.64 25 47 54 6.54
533 B1.5 Ia+p Nwk – 0.20 5.89 – 5.88 5.88 37 – >60 –
578 B1.5 Ia Nwk 578 0.36 0.39 5.19 5.35 5.40 5.35 24 26 27 6.78
590 B0.7 Iab – – 0.25 5.87 – 6.01 5.87 57 36 39 6.63
591 B0.2 Ia – – 0.27 5.91 – 6.14 5.91 53 48 53 6.52
672 B0.7 II Nwk? 672 0.30 0.25 5.09 5.23 5.22 5.23 18 27 29 6.75
696 B0.7 Ib-Iab Nwk – – 0.20 5.42 – 5.64 5.64 33 37 40 6.62
714 B1 Ia: Nwk 0.22 – 4.77 4.74 – 4.74 7 22 23 6.84
732 B1.5 Iap Nwk – 0.28 5.41 – 5.61 5.61 33 32 35 6.69
745 B2.5 II-Ib 0.32 – 3.99 4.20 – 4.20 4 15 15 7.07
826 B1 IIn – – 4.85 – – 4.85 17 16 16 7.04
831 B5 Ia – – 5.10 – – 5.10 17 21 22 6.87
841 B2.5 Ia 0.46 0.51 5.09 5.10 5.14 5.10 14 25 26 6.80
845 B1 II 0.23 0.21 4.64 4.78 4.79 4.78 14 16 16 7.04
855 B3 Ib 0.16 0.05 4.40 4.32 4.20 4.32 6 14 14 7.11
867 B1 Ib Nwk 0.18 0.11 4.91 4.93 4.88 4.93 14 20 21 6.90
027 B1 III-II 0.14 0.01 4.63 4.63 4.46 4.63 12 14 14 7.12
045 O9.7 Ib-II Nwk 0.34 0.39 5.20 5.24 5.28 5.24 18 30 31 6.68
291 B5 II-Ib 0.26 0.18 4.09 4.31 4.23 4.31 6 14 14 7.11
420 B0.5 Ia Nwk – 0.22 5.84 – 5.95 5.84 57 35 37 6.63
423 B1 Ia: Nwk – 0.40 5.59 – 5.72 5.72 38 36 39 6.64
430 B0.5 Ia+((n)) Nwk 0.50 0.45 5.44 5.56 5.59 5.56 18 – >60 –
450 O9.7 III: + O7:: 0.25 0.25 5.56 5.67 5.67 5.67 36 39 42 6.59
525 B0 Ia 0.21 – 5.44 5.48 – 5.48 23 39 42 6.59
541 B0.5 Ia Nwk 0.19 0.23 5.54 5.57 5.63 5.57 31 34 36 6.65
576 B1 Ia Nwk 0.51 0.60 5.18 5.31 5.39 5.31 16 32 35 6.69
652 B2 Ip + O9 III: 0.26 0.23 5.14 5.16 5.19 5.16 10 44 49 6.56
675 B1 Iab Nwk 0.25 0.30 5.09 5.16 5.20 5.16 13 30 32 6.72
687 B1.5 Ib((n)) Nwk 0.20 0.23 5.04 4.95 4.97 4.95 10 25 25 6.80
733 O9.7p 0.21 0.12 5.26 5.34 5.23 5.34 21 32 34 6.65
764 O9.7 Ia Nstr – 0.13 5.96 – 5.85 5.85 50 44 48 6.54
779 B1 II-Ib 0.22 0.36 4.62 4.73 4.86 4.73 11 17 17 7.00
827 B1.5 Ib 0.41 – 4.71 5.03 – 5.03 28 15 15 7.08
829 B1.5-2 II 0.21 – 4.91 4.78 – 4.78 11 18 18 6.96

Notes. The infrared extinctions (Ak) used to calculate these values are included. Also listed are the stellar parameters obtained from single-star evolutionary models. Stellar ages (t) are in years, whilst both the initial (Mo) and current (Me) evolutionary masses are estimated.

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